Weather strip



May 28, 1940. 0. DAHL ,20 ,48

WEATHER STRIP Filed Dec. 10, 1938 04 cad/z:

7 W, @a @Aw v v a? Patented May 28, 1940 UNITED STATES P T OFFICE A V 4 I v WEArHER sTRI'PILQ I I Oscar Dahl. Chicago,- 111., assignor to 'Maurice S. Oftedal, doing business as Master Metal Strip Service, Chicago, Ill. 1 i t Application December lo, 193; Serial a. 544,900

is Claims. (or. 204-69) This invention relates to a Weather strip structure and particularly to a structure wherein strip material is employed on thresholds, sills, window easements, and the like,-to provide a weatherproof seal between the sash 'or door and the-sill or threshold, but which may at the same time permit the ready opening and closingof the doors or windows. 7 e 1 It is an object to provide a structure thatis particularly useful in. easements having inwardly swinging windows or doors. c I

- It has been difficult in the past ,to provide a structure that will provide a weathertight closure,

particularly at the bottom of a hinged sash,

' where it is especially desirable to provide a snuglyfitting seal and at thesame time'prevent' the accumulation of water on the sill or adjacent the inner'side of the sash or door. .It often happens in cold Weather that condensati0n'- water accumulates on the inside of casement windows and-the like, and the water has a tendency to.

drip from. the sash onto the floor or to accumulate on the sill. -This is effectively prevented in the instant invention. 1 1

'It is, therefore, an objectof this inventionto provide means for collecting the condensation water and to discharge it to the outsideof the easement, and also'to discharge to the outside any water whichmay in any way accumulate inthe' strip. A further object is to provide a weather strip of the'character. described for window easements and the like having means for retaining calking" material and for snug sealing engagement with asupport whereby leakage of moistureunder the i strip-isprevented when the latter is secured-to.

the support. a

. :It also an object to provide'a threshold seal or weather strip structureof the character de-' scribed which will be :of few parts, cheap to manufacture, easy to assemble, and which may readily be disassembled for cleaning; also which will not easily get out of order in use.

. Further objects will be apparent from-the specification and the appended claims.

' In the drawing:

Fig.1 is a sectional perspective view of one embodiment of the invention wherein awindoW sash, or the like, is shown in partially opened" position.

' Fig. 2 is a sectional view of the embodiment shown in Fig. l with the sash in closed position Fig. 3 is an enlarged transverse section through the weather strip base.

In practicing this invention, the weather strip may. be secured to the window sill or casement frame in alignment. with the edge of the closed sash. "I'he'iweather strip per se may comprise an elongated channel bar comprising a base portion andtwo. oppositely disposed upwardly extending web. portions orv flanges. The outside web portion is-adaptedto engage a complementary portion of the sash-when the window in closed position in a manner to form a substantially weatherproof joint therebetween and. to enable the co-operating parts to be e'asilyseparated so, that the sash or door may readily-be opened. Theheight of the 1 collect; any water which 'may drip from the inner surface of the sash and the water will be directed into. the {channel proper, from which it is. discharged to the outside through suitable weep holes. I The outside web portion may terminate an inturned fiange adapted; to engage ina complementary U-shaped strip secured to the sash or'door,g hereby a tight joint-is provided between the, sash and rthe {sills The inside web'portion may have a resilient sheet metal strip frictionally pengaged thereoverfor convenient removal and having an arcuate portion extendingfinwa rdly of r the channel and adapted to frictionally engage substantially to the shape of theinner flange,

ment or doorwhen it is in the closed position and to provide a suitable drain in both'directions.

;Suitable weep holes are provided in the resilient sealing member adjacent the inner flange, and

other weepholes are provided through the outer web to permit the moisture entering the channel to be discharged-to the outside of the window weather strip.

A suitable apron or shield may be. provided on the outside of the strip and arranged to cover the weep holesto protectthem from the wind and whereby it may remo'vably be clamped thereon, andthe freeend extends inwardly of the channelv and is arcuately formed to provide a weatherproof sealiagainst the bottom edge of the, casetheloweredge of the closed sash. The clamping portion of this resilientstrip preferably conforms to prevent clogging of .the holes during painting or by reason I e of accumulation of dirt adjacent the outside edgeof the weather strip.

Referring to the drawing in detail, the embodiment illustrated comprises a window sash or door 1 which is hinged at 2 to a casing comprising vertical uprights 3 and a sill 4. The upper surface of the sill 4 is preferably angularly disposed as shown so as to direct moisture to the outside of the casing. The uprights 3 and sill 4, together with suitable stops 5, provide a casing for the sash I, which latter may be opened and closed as desired. The description herein will be confined to a casement window. However, it will be understood that the weather strip is adaptable to any structure having a casing and a hinged closure therefor substantially asillustrated.

The vertical casings 3 may be provided with sheet metal strips 6 which are of resilient material and may be secured by brads or screws 1 along one edge, whereby they resiliently bear against the edge of the door when it is closed to provide weatherproof engagement.

The weather strip per se comprises an elongated channel member having a substantially flat base portion 8 which substantially conforms to the angular surface of the sill, as shown. The under surface of this flat base is provided along its lateral edges with ribs 9 and NJ. The lower surface of these ribs is preferably arcuate in form, as shown in Fig. 3, in order to provide cutting edges H which effectively seal the joint between the sill and the weather stripwhen the weather strip is secured in position. The bottom of the strip is also provided with downwardly extending ribs I2 which are spaced to provide channels l3 to retain a suitable calking material l3a, as shown in Figs. 1 and 2. The strip may be provided with a central groove br mark which is formed at the time that the strip is made in order to provide an aligning means for drilling suitable holes through which screws l4 may be inserted to secure the weather strip to the sill as shown.

It will be apparent that, when the strip is clamped snugly against the sill by means of the screws M, the cutting edges ll, together with the calking material, will effectively seal the joint between the strip and the sill. The channel member 8 is preferably of substantially rigid material and ordinarily is made of extruded metal, so that it is preferable to drill the holes for the screws l4 after the channel itself has been formed. The channel member is provided with oppositely disposed upwardly extending flanges extending along its marginal edges and the'inner flange l5 preferably extends substantially 45 degrees to the inner surface of the sash or door when closed. This flange also extends somewhat beyond the inner surface of the sash, as shown in Fig. 2, so that any water of condensation forming on the inner surface of the sash will be caught by this angular flange and be directed into the channel proper. This flange preferably terminates in a rounded edge, as shown, and the outer edge is preferably some what thicker than the inner portion of the flange so that the resilient sheet metal sealing member may readily be clamped thereover. This seal ing member will be described in detail later. vThe outer flange l6 extends upwardly slightly above the bottom of the door, as shown, and terminates in an inturned flange H, which also is preferably provided with a rounded edge and forms a tongue for engagement in a complemental groove on the sash to provide a substantially weatherproof seal therewith. A downwardly extending shield or hood l8 is provided on the outside of the strip and comprises a downwardly and outwardly extending flange which is preferably substantially of the contour shown and terminates adjacent the sill. This shield or hood is for the purpose of shielding suitable weep holes 19 in the flange l6 which are arranged to drain any water from the channel to the outside of the casement window.

The outside of the sash may be grooved to receive the inturned flange l1. However, a preferable construction is to notch or routout the corner of the casement, as shown at 2|], to receive a U-shaped sheet metal member 2|, which is provided with an upturned flange 22 whereby it may be secured to the sash by any suitable means such as the brads or nails 23. The member 2| is preferably of resilient sheet metal and so formed as to snugly engage the inturned flange l I when the sash is closed, to thereby provide a weatherproof joint.

A resilient sealing member 24 is provided with an angular U-shaped portion 25, which is arranged to resiliently embrace the inwardly extending flange l5 so that it is snugly retained thereon and yet may easily be removed whenever desired. This resilient sheet metal member 24 is provided with an upwardly arcuate free portion 26, which engages the bottom edge of the sash, as shown, when the sash is closed and which terminates substantially in alignment with the edge of the inturned flange l I. The free edge is turned downwardly whereby any water'which passes over the flange I! when the sash is open will be directed into the channel. The sheet metal member 24 is provided with weep holes 2'1 closely adjacent the flange I5, and these weep holes are preferably staggered relative to the weep holes 19 in the outer flange so that excessive draft is prevented through the weather strip. It will be clear that, with this construction, when the sash is closed the weather strip and resilient members associated therewith will provide an effective'weatherproof seal between the sash and the sill. Also, the sash may easily be opened or closed and water of condensation forming on the inside of the sash will drop within the outturned flange l5 and pass through the weep holes 21 into the channel portion of the weather strip; from which it will drain through the outer weep holes l9.

The resilient sealing member 24 is particularly advantageous in the present construction in that it may easily be removed merely by lifting it from the flange 25, and therefore the chan-' nel may easily be cleaned at any time and the resilient sealing member may easily be replaced and will be securely held in position.

Modifications may be made without departing from the spirit of the invention, and it is therefore desired that the invention be limited only by the prior art and the scope of the appended claims.

Having thus described this invention, what is claimed and desired to be secured by Letters Patent is:

1. A channel bar weather strip comprising a base portion, two upwardly extending oppositely disposed web portions, an inwardly extending flange adjacent the upper end of one of said upwardly extending portions adapted to frictionally' engage in a complementary groove in the outside surface of a hinged sash, and an elongated trough-like spring sealing member removably secured to the other of said upwardly extending portions and having its free edge dow sash and a channel bar secured to said case-' ment in alignment with said sash when in the closed position, said channel bar having an up-' wardly extending web adjacent the outside edge of said sash, said web having an inwardly extending lip member positioned adjacent the up fii."

extremity thereof, and'a second upwardly extend.-.

ing web portion projecting beyond theinside.

edge of said sash when closed, the outside edge of said sash having a resilient grooved member secured thereto adapted to frictionally engage said inwardly extending lip member to provide a substantially weathertight seam,- a trough-like spring strip memberhaving one edge embracing said second Web with its. free edge adaptable to frictionally engage the bottom of said sash when said sash is in the closed position to form atrough in the plane ofth'e inner surface of said sash to receive moisture dripping therefrom, said strip member and said outer web having open-.

ings to direct moisture from said sash to the cut side of said channel bar. e

3. A channel bar construction as defined in claim 1 having the perforations positioned in staggered relationship in said elongated spring member and in said first described upwardly extending web portion, said portion being provided direct water to the outside of said sash.-

flange for shielding'the perforations in said mem- 4. Achannel bar Weatherstrip having a web adapted to'be secured to a sill, a comparatively high outer flange adapted to engage the outer side'of a swinging sash,'an inner flange extending I angularly beyond the inner-surface of said sash,

I with an --outwardly and downwardly extending and a resilient sheet metal trough having one side substantially conforming to the inner surface of I said inner flange and formed to embrace said, 1 flange for removable support thereon, the free side of said trough extending upwardly toward said outer flange and adapted to frictionally engage the bottomsurface of said sash, said trough and said channel having drain perforations to,

'5. A- weather strip-fora casement sash comprising a'channel bar having an outer flangev adapted toprovide a stop for said sash, an inner flange below the path of said sash, and a resilient sheet metal;v trough positioned to catch water dripping from theinner surface ofsaid sash, one" side of said trough being formed to resiliently,

and removably'ngage said inner flange to removablyssupport said trough and having its free side positionedtofrictionally engage the bottom of said'sash; said channel bar and said trough having openings to-direct'water therefrom. 6. Thecombination with'a casement sash, of a weather strip comprising achanneI-liketrOugh' positioned under said closed-sash to receive water entering therebetwe'en,'and a second trough in "alignmentwith the inner surface of said sash and having a 1 resilient freer side frictionally engaging the bottomof said "sash, 'and resilientmeans reg movably clampingsaid troughs together;

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